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Sorting is ordering a list of objects. We can distinguish two types of sorting. If the number of objects is small enough to fits into the main memory, sorting is called internal sorting. If the number of objects is so large that some of them reside on external storage during the sort, it is called external sorting.
The Collections class in Java provides a sort() method that allows a (modifiable) list to be sorted. The first line creates an in-line array of Objects that can be used to sort strings. The Arrays utility class then converts the array into a List. This is an efficient way to create a List, which can then sort data. Once we have the array, we then use the Collections.sort() method. It modifies the target list and arranges the elements in their natural order. The resulting list then displays to the console.